/* 
   Copyright (c) 1989  X Consortium

   Permission is hereby granted, free of charge, to any person obtaining a copy
   of this software and associated documentation files (the "Software"), to deal
   in the Software without restriction, including without limitation the rights
   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   copies of the Software, and to permit persons to whom the Software is
   furnished to do so, subject to the following conditions:

   The above copyright notice and this permission notice shall be included in
   all copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
   X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
   AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

   Except as contained in this notice, the name of the X Consortium shall not be
   used in advertising or otherwise to promote the sale, use or other dealings
   in this Software without prior written authorization from the X Consortium.

 */

#include <X11/Xlib.h>
#include <X11/Xatom.h>

static Window TryChildren();

/* Find a window with WM_STATE, else return win itself, as per ICCCM */

Window XmuClientWindow(dpy, win)
Display *dpy;
Window win;
{
    Atom WM_STATE;
    Atom type = None;
    int format;
    unsigned long nitems, after;
    unsigned char *data;
    Window inf;

    WM_STATE = XInternAtom(dpy, "WM_STATE", True);
    if (!WM_STATE)
	return win;
    XGetWindowProperty(dpy, win, WM_STATE, 0, 0, False, AnyPropertyType,
		       &type, &format, &nitems, &after, &data);
    if (type)
	return win;
    inf = TryChildren(dpy, win, WM_STATE);
    if (!inf)
	inf = win;
    return inf;
}

static
Window TryChildren(dpy, win, WM_STATE)
Display *dpy;
Window win;
Atom WM_STATE;
{
    Window root, parent;
    Window *children;
    unsigned int nchildren;
    unsigned int i;
    Atom type = None;
    int format;
    unsigned long nitems, after;
    unsigned char *data;
    Window inf = 0;

    if (!XQueryTree(dpy, win, &root, &parent, &children, &nchildren))
	return 0;
    for (i = 0; !inf && (i < nchildren); i++) {
	XGetWindowProperty(dpy, children[i], WM_STATE, 0, 0, False,
			   AnyPropertyType, &type, &format, &nitems,
			   &after, &data);
	if (type)
	    inf = children[i];
    }
    for (i = 0; !inf && (i < nchildren); i++)
	inf = TryChildren(dpy, children[i], WM_STATE);
    if (children)
	XFree((char *) children);
    return inf;
}
